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江垭水电站主副厂房开挖时 ,出露F15断层 ,它与层间错动带及节理切割形成不稳定块体。采用了预应力锚索、锚喷、混凝土格栅等加固措施。在岩锚梁夹泥及破碎带部位以及不利于锚索施工的部位 ,采用了固结灌浆措施。灌浆结束后 ,通过桥机 40 0t动荷载和 5 0 0t静荷载分级加载试验 ,设在岩壁吊车梁内的测缝计没有变化 ,锚杆应力计处于弹性状态 ,卸荷后岩壁吊车梁残余变形量为 0 .8mm ,小于设计值 1.0mm。对F15断层岩锚梁部位固结灌浆的处理情况作了详细介绍 ,其经验可供其它类似工程借鉴。
During the excavation of the main and auxiliary workshops of the Jiangya Hydropower Station, the F15 fault is exposed, which forms an unstable block with interlayered fault zone and joint cutting. The use of prestressed anchor, anchor spray, concrete grilles and other reinforcement measures. In the rock anchorage folder mud and broken belt site and is not conducive to the anchor cable construction site, the use of consolidation grouting measures. After the grouting, through the bridge machine 40t dynamic load and 500t static load grading test, the seismometer installed in the rocker crane beam has no change, the anchor stress meter is in the state of elasticity, and the rockfill crane beam The residual deformation is 0.8mm, less than the design value of 1.0mm. The treatment of consolidation grouting at the anchor beam section of F15 fault rock is described in detail, and its experience can be used as reference for other similar projects.